Pro-tip: I used to curse my bike: the chain fell off all the time, the gears slipped, the shifting was fiddly, the brakes were crap. Then I, by luck[1], stumbled on owning a more expensive mountain bike, and things stopped failing. Cheap bikes are crap.
[1]: I bought a mid-price mountain bike, nothing fancy, in the era before rear suspension was common. It got stolen within a year. I was part of my parents' grandfathered insurance plan that had unbelievably good coverage for bicycle theft. Insurance replaced the bike with one that had all the same features. Not price matching, matching checklist features. Number of gears, etc. It ended up having some extra features, too, because that was what was in the inventory. After that bike was also stolen within a year, they replaced that with one that had all the features that were in the second one. Plus disc brakes, plus many others, because nothing else fulfilled the checklist. The price of my bike more than doubled in two years. No, you can't get that insurance anymore.
[1]: I bought a mid-price mountain bike, nothing fancy, in the era before rear suspension was common. It got stolen within a year. I was part of my parents' grandfathered insurance plan that had unbelievably good coverage for bicycle theft. Insurance replaced the bike with one that had all the same features. Not price matching, matching checklist features. Number of gears, etc. It ended up having some extra features, too, because that was what was in the inventory. After that bike was also stolen within a year, they replaced that with one that had all the features that were in the second one. Plus disc brakes, plus many others, because nothing else fulfilled the checklist. The price of my bike more than doubled in two years. No, you can't get that insurance anymore.